Improvement in watch-regulators



F. WILMOT.

Improvement in Watch-Regulators.

YPaenteciluy16,1872.

Miu-MM5.'

UNITED STATES PATENT .OFFICE FRANQOIS WILMOT, OF NEW YORK, N. X.

IMPROVEMENT IN WATCH-REGULATORS.

Speciication forming part of Letters Patent No. 129,197, dated July 16,1872.

To all to whom 'it may cof/acera:

Be it known that I, FRnNors WILMOT, of the city, county, and State ofNew York, have invented certain new and useful Improvements inRegulators for Watches; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawing forming part of this specification, and inwhich- Figure l represents an outside face view of a watch-regulatingmovement constructed in accordance with my invention, Fig. 2, an insideface view of the same, and Fig. 3, an edge view thereof.

Similar letters of reference indicate corresponding parts.

My invention consists, rst, in improved means for setting or adjustingthe regulatinglever, whereby the most minute and exact adjustments maybe made by the application of the watch-key to the arbor of anadjustingcam. It also consistsin a compensating springattachment of oneof the curbs of the regulating-lever, whereby the speed of the watch isretarded when placed horizontally, and thus a uniform or nearly uniformvelocity insured for it in its change of position from horizontal tovertical.

In the accompany drawing, b represents the jewel of the balance-statt',and C the regulating-lever, which is of the iirst order and is arrangedto move about or around the axial line of the balance-staff. The one armof said lever is bent at d, and is forced or held by a sprin g. c, upagainst an adjusting-cam, D, that is iitted on an arbor, f, formed withasquare on its outer end to provide for the turning of the cam, and of agraduated disk or wheel, E, connected with it by means of the key of thewatch, the barrel of the key itting the square of the arbor. The cam Dand the spring e combined serve to eect the adjustment of theregulating-lever in the nicest or most gradual manner, the movement ofthe cam by the key facilitating the control, and the graduated disk E,in conjunction with a xed index, F,

determining the precise adjustment made or to be made. The arm of theregulating-lever C, which acts upon the balance-spring, has onlydirectly or rigidly connected with it one, g, of the two curbs g he, bywhich said spring is controlled, the other curb h being carried by abent or bowed spring, G, which is secured at z' to one side of thelever, and so that, when the watch is in a vertical position, therestricted movements of the balance-spring, incidental to such position,cause the spring Gr of the curb h, in a measure, to be passive; but whenthe watch is in a horizontal position, then the increased movements ofthe balancespring give activity to the spring G and the curb or curbsexert a retarding eifect upon the watch. The object of this' is to makethe watch keep time in both of the usual positions to which it iscommonly exposed. Thus, it is well known by watch-makers and othersthat, however accurately a watch may be regulated to run in a suspendedor vertical position, it is apt to gain slightly when placedhorizontally, by reason of the diminished friction of the pivots in thelatter position. This tendency to acceleration is prevented by thespringheld curb IL, which then acts upon the balancespring with aretarding effect, the spring F yielding slightly to the longer andfaster vibrations of the balance-spring, consequent upon the diminishedfriction of the pivots.

What is here claimed, and desired to be secured by Letters Patent, is-

l. The combination of the cam D and its adjusting-arborf with theregulating-lever C, the spring e, the graduated disk E, and the index F,substantially as specified.

2. The attachment of one of the curbs h to the regulating-lever C bymeans of a spring, G, essentially as and for the purpose herein setforth.

' F. WILMOT.

Witnesses:

FRED. HAYNEs, R. E. RABEAU.

